Magneto-electric machine



4 Sheets-Sheet I.

(No Model.)

W. HUMANS. MAGNETO ELECTRIC MACHINE.

No. 453,242. Patented June 2,1891.

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(No Model.) 4 Sheets-Sheet 2.

W. HUMANS;

MAGNETO ELECTRIC MACHINE.

No. 453,242. v Patented June 2,1891.

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4 Sheets-Sheet 3.

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Patented JunZ, 1891.

(No Model.)

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(No Model.) 4 Sheets-Sheet 4.

W. HUMANS.

MAGNETO ELECTRIC MACHINE.

No. 453,242. Patented June 2, 1891.

wh esses. 55 IIlVELllZUK UNITED STATES PATENT OFFICE.

WVILLIAM HUMANS, OF CAMBRIDGE,MASSACHUSETTS, ASSIGNOR TO THE AMERICAN MAGNETIC ELECTRIC COMPANY, OF JERSEY CITY, NEV

JERSEY.

MAGNETO-ELECTRIC MACHINE.

SPECIFICATION forming part of Letters Patent No. 453,242, dated June 2, 1891.

Application filed July 2 3 1 88 5.

To all whom it may concern.-

Be it known that I, WILLIAM HUMANs, of

. Cambridge, in the county of Middlesex and State of Massachusetts, have invented a new and useful l\lagneto-l\lachine, adapted especially for medical purposes, of which the following is a specification, reference being had to the accompanying drawings, in which- Figure 1 is a plan with the cover and finishing-plate removed, and Fig. 2 is a central vertical section, of a machine embodying my invention. Figs. 3, 4, 5, and 6 and 11 to 17 are details, Fig. 3 being a partial plan to illustrate the adjustment of the magnet, Figs. 1, 5, and G-being sections on the sectionlines shown in Fig.1. Fig. 11 is an elevation of the cap h. Fig. 12 is a side elevation of the rubber block, showing the half-rings c in edge view. Fig. 13 is a lengthwise section illustrating the pole changer or commutator. Fig. 14 is a sectional detail illustrating the current-reverser. Fig. 15 is a detail illustrating one of the brushes. Figs. 16 and 17 aredetails, one in plan the other in elevation, partly in section, illustrating the eccentric, its strap, and index for adjusting the magnet. Figs. 7 and 8 are top and bottom plans with the lids removed. Fig. 9 is a cross-section. Fig. 10 is a plan view, partly in section, illustratingthe circuits. Figs. 18, 19, and 20 illustrate the pocket form of my machine. Fig. 21 shows the handles placed at the sides of the magnet.

My invention is a compact, durable, and simple magneto-machine by which currents are readily generated, which are amply sufficient for all medical purposes, and which can be regulated with the utmost nicety to suit the needs of the patient.

My machine consists, mainly, of the magnet A, armature B, the coils D and E, one set on the armature, the other on the magnet, the shaft F, by which the armature and its coils are revolved, all mounted in a suitable frame; but these parts or their equivalents are all old and have before been combined together in many ways; and my invention consists, first, in the means for giving a very rapid and Serial No. 172,439. (No model.)

smooth rotation to the armature; in means for adjusting the magnet readily and with minute variations toward and from the armature; in means forholdin g the magnet-coils in place; in the construction of the interrupter, and, lastly, in a box or case with a hinged lid at both top and bottom, in combination with a magneto-machine, whereby the case may be made so that the whole machine can be carried in the pocket by having the lids down close to the frame; or, when farther from the frame, the case will serve not only as a case for the machine, but also as a receptacle for the handles, crank, and other appliances used with the machine.

The shaft F, on which the armature B is fast, has a pivot at each end, one pivot being supported in a projection f on the frame, the other entering a hardened block f which is held by the screw f in the projection f. The pinion 1), fast to the armature shaft, meshes with two gears 1) b and these gears are fast each to its shaft 11 b, and these shafts are driven by the pinions b I), both of which mesh with the gear 12 fast to the shaft D which ends at a hole through the side of the case J, in order to receive the crank-handle by which the shaft b is revolved. This gives an extremely rapid and very smooth and steady revolution of the armature.

The magnet A is connected by the rod a to the eccentric a, and as the index a is fast to this eccentric the magnet maybe adjusted with its poles closer to or farther from the poles of the armature by turning the index, and thereby the tension of the current generated be varied.

The pole-changer is composed of the usual metallic parts 0; but these parts are clamped between the two disks of rubber c 0 and these rubber disks are firmly held upon the shaft between the nuts 0 The spaces between the metal parts 0 are preferably filled by strips of rubber or the like.

The brushes c are projections from spiral springs, one end of the wire resting upon the rubber block 0 or being otherwise secured, and the other end of the wire projecting up or controlling an arm which projects up and comes in contact with the metal 0, the body of the spring being held to the rubber block. This construction of the brushes enables the arms in contact with the half-rings c to be very short, and yet to bear on the rings with a soft elastic bearing, and at all times with a substantially equal pressure. A shoe 0 is used upon each brush to make a better contact, and for greater durability, and when swiveled, as shown, always makes a broad contact of small resistance. The shoe c is a block of metal with a groove in one side to fit the half-ring c, and having a hole through it to receive the wire 0, as clearly shown in Fig. 15 and also in Fig. 10.

The electrodes (Z d are the main electrodes of the machine, one being positive and the other negative when the armature is revolved in a certain direction, for one is in electric connection with one of the brushes and the other with the other brush.

The conducting-cords (1 by which the circuit is carried through the handles, may be connected directly with the electrodes d (1; but it is desirable in medical machines to shift the current at times, and this feature of my invention consists in a magneto-machine provided with a switch by which the polarity of the current can be reversed while the handles-are held by the patient.

The switch G is a slide controlled by the handle g, so that when the handle is near N (see Fig. '7) the current is from left to right in Fig. 10, but when the handle is nearP the current is reversed. The switch G carries two cups g 9 each adapted to receive a pin attached to the end of the conducting-cord. The cup 9 is electrically connected to two electrodes g 9 and the cup g is electrically connected to two other electrodes g g, so that when switch G is in one position the cup 9 is in electric connection with d, or the negative pole of the machine, and the cup g with cl or the positive pole of the machine, while by moving the handle g from N to P, Fig. 7, the switch G is shifted and the current reversed.

The magnet-coils E (see Figs. 1 and 5) are held in place by the strap 6 of sheet metal, which is laid betweenthe cars a. The block (2 is then laid upon it; and the upper edges of the ears e are then bent over to hold block 6 in place. The strap 6 is then bent. up and over the coils E and its ends secured by the screws 6 which pass through blocks soldered on near the ends of strap 6. This makes a secure and cheap fastening for holding the coils.

The interrupteris a disk 7L, of metal, in electric contact with the shaft and having two pins h, which come into contact alternately with the spring 72, which is insulated from the shaft and the frame of the machine, but in electrical connection with the holder d, which is also insulated from the frame, so that when either pin h is in contact with j and the lids or covers j and 3' spring 7L2 the current is short-circuited from cl through 7&2 to the shaft and frame to (Z, which is uninsulated from the frame.

The box or case J is composed of the sides I have shown the sides of considerably greater width than the frame of the machine in order to allow room between the top and bottom and the frame for the handle and other appliances; but in my pocket-machines the sides are only a trifle wider than the frame, so that the lids shut down close to the frame, the machine with the lids closed being so thin that it may be carried in the pocket, and yet there being ample room for the revolution of the armature-coils when the lids are open.

In operation a current is generated in the armature-coils D and also in the magnetcoils E, and as one end of the armature-coils is in contact with one of the metal pieces 0 of the pole-changer and the other end with the other metal piece 0 the currents generated in the armature-coils are gathered by the brushes. The currents generated by the magnet-coils E are joined to the currents of the armature-coils by reason of the fact that one of the brushes c is in contact with one end of the magnet-coil E, (see Fig. 10,) and also alternately in contact with the ends of the armature-coil D, while the other end of the magnet-coil is in contact with the frame, and consequently in electric connection with holder cl, which is uninsulated from the frame. The current therefore is from one of the coils D through coils E by means of the connection between one end of coil E and brush 0 and from coils E through the frame to holder (Z. The washer K fits the shaft F snugly and is forced out by its spring K against the interior surface of the case J when the crankhandle is removed from the shaft F, thus closing the case against dust and the like; but when the crank-handle is secured on the shaft the washer is forced back against its spring, so that it will not act as a brake. This is a minor feature of my invention, but of considerable practical importance.

\Vhat I claim as my invention is 1. In combination, armature B, shaft I pinion b, the two gears 12 b shafts b b pinions b b, gear 11 and shaft substantially as described.

2. Magnet A, in combination with connecting-rod a and eccentric a, substantially as and for the purpose specified.

3. The scale and index, in combination with the magnet A, connecting-rod a, and eccentric a, substantially as described.

at. The magnet-coils E,in combination with strap 0, holding-block c and screws 6, substantially as described.

5. The interrupter above described, composed of disk 7L and pins 7t, in combination with spring h substantially as described.

6. The combination of the shaft F, carrying the armature B, and the armature-coils D D, with the case J, having a, hole through 7. The washer K and its spring K, in comit, in which the armature and the arniaturebination with case J and the shaft F, subcoils are rotated, and provided with lids jj stantially as described.

which when shut confine the armature and XVILLIAM HUMANS. 5 its coils in the hole in the case and when Witnesses:

open allow the armature and its coils to be J. E. MAYNADIER,

rotated, substantially as described. JOHN R. SNOW. 

